【问题】

I have to merge different files into one file according to the time stamp. I have succeeded in sorting them and bringing them to one single file. In order to know where the lines came from(from which file), i am trying to add the original filename beginning of each line.

For ex:

File1 :

12:23:21,234 some text

13:23:21,234 some text

17:45:12,576 some text

File2 :

15:23:21,234 some text

15:28:01,254 some text

Merged file :

File1 \- 12:23:21,234 some text

File1 \- 13:23:21,234 some text

File2 \- 15:23:21,234 some text

File2 \- 15:28:01,254 some text

File1 \- 17:45:12,576 some text

I am trying to add that filename in the beginning of each line like mentioned above. Could anyone help me figure out how to append the file name?

【回答】

将 N 个文件分别按行读入，并各加一列“文件名”，再做纵向合并，形成两个字段的二维表。按第 1 个字段（原字符串）排序，再整理成“文件名 – 原字符串”，最后输出到文件。

JAVA 缺乏相关类库，实现麻烦。可用 SPL 辅助实现再集成，代码简单易懂：